We're running Exchange v5.0, sp2. We've had a few messages recently from external sources that hit our users' mailboxes reporting this error:
The Microsoft Exchange Server received an Internet message that could not be processed. To view the original message content, open the attached message.
What I'm suspecting is that the newer versions of Netscape (that the sender is using) have a new MIME encoding that our older Exchange Server is not able to interpret.. Any clues would be greatly appreciated.
From within the attached message, here is the RAW SMTP header;
Received: from mail.cyberus.ca by torrlpexc.royallepage.com with SMTP (Microsoft Exchange Internet Mail Service Version 5.0.1460.8)
id XGXZN31V; Thu, 9 Dec 1999 17:36:58 -0500
Received: from cyberus.ca (ip86.ts17-1.mn.dialup.ottawa.cyberus.ca [22.214.171.124])
by cyberus.ca (8.9.3/8.9.3/Cyberus Online Inc.) with ESMTP id RAA25593;
Thu, 9 Dec 1999 17:22:25 -0500 (EST)
Disposition-Notification-To: Murray Mosher <firstname.lastname@example.org>
Date: Thu, 09 Dec 1999 17:21:40 -0500
From: Murray Mosher <email@example.com>
X-Mailer: Mozilla 4.7 [en] (Win98; I)
To: firstname.lastname@example.org, email@example.com
Subject: Aerials for Nathan
This is a multi-part message in MIME format.
Content-Type: text/plain; charset=x-user-defined
Nicky: Images 4&5.